/*
 * This file is part of the Sx Framework Library.
 * 
 * Copyright (C) 2013 University of Colorado Denver
 * <min.choi@ucdenver.edu> <shane.transue@ucdenver.edu>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 * copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */
#ifndef SX_ASSERT_H
#define SX_ASSERT_H

#include <iostream>

/*
 * Asserts that the provided expression x is true. If the expression evaluates
 * to false then the assertion will fail. When an assertion fails, the 
 * expression that failed is printed along with its liine number and the file
 * it is contained in.
 * 
 * x Represents the expression to be tested.
 */
#define SX_ASSERT(x) \
if ( !(x) ) { \
	std::cout << "[Sx:Assert] Error: " << #x << " assertion failed." << std::endl; \
	std::cout << " on line: " << __LINE__ << std::endl; \
	std::cout << " in file: " << __FILE__ << std::endl; \
	std::exit(1); \
}

#define EPSILON_TEST 0.0001

/*
 * Asserts that a floating point value x is equal to t within the tollerance
 * threshold of e (epsilon). If ( x ~ t ) then the assertion is satisfied;
 * otherwise the asserion fails.
 *
 * x Represents the value provided that will be tested.
 * t Represents the target value that the test value should match.
 * e Represents the epsilon value that will be used to account for the floating
 * point representation error.
 */
#define SX_ASSERT_FLOAT(x, t, e) \
if ( ((x) < ((t) - (e))) || ((x) > ((t) + (e))) ) { \
	std::cout << "[Sx:Assert] Error: " << #x << " " << #t << " " << #e << " assertion failed." << std::endl; \
	std::cout << " on line: " << __LINE__ << std::endl; \
	std::cout << " in file: " << __FILE__ << std::endl; \
	std::exit(1); \
}

/*
 * See SX_ASSERT_FLOAT.
 */
#define SX_ASSERT_DOUBLE(x, t, e) SX_ASSERT_FLOAT(x, t, e)

#endif
